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Is it real or just my imagination?

I recently checked and re-biased my ARC VT100 Mk II power amp. Tubes had not been re-biased since new, and the hours had reached around 500, so I felt it was time to check and adjust if necessary. Spec is 130. One channel measured 128, and the other 125. I set them both to spec, closed the amped, and took a listen. I was surprised to find that the amp sounded more dynamic, more "alive". I was surprised that this small a change in bias would make a clearly audible difference. Any body else have a similar experience ?
mabonn

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almarg
9,670 posts
 
Is it real or just my imagination?
Don't know. But there's one way to be (fairly) certain, although it will require some investment of time and effort. Go back and forth a couple of times between the two settings. And be sure that the warmup status of everything in the system is the same or similar for each of the assessments.

Regards,
-- Al
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